// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef MEDIA_AUDIO_CRAS_AUDIO_MANAGER_CRAS_H_
#define MEDIA_AUDIO_CRAS_AUDIO_MANAGER_CRAS_H_

#include <cras_types.h>

#include <string>

#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "media/audio/audio_manager_base.h"

namespace media {

class MEDIA_EXPORT AudioManagerCras : public AudioManagerBase {
public:
    AudioManagerCras(
        scoped_refptr<base::SingleThreadTaskRunner> task_runner,
        scoped_refptr<base::SingleThreadTaskRunner> worker_task_runner,
        AudioLogFactory* audio_log_factory);

    // AudioManager implementation.
    bool HasAudioOutputDevices() override;
    bool HasAudioInputDevices() override;
    void ShowAudioInputSettings() override;
    void GetAudioInputDeviceNames(AudioDeviceNames* device_names) override;
    void GetAudioOutputDeviceNames(AudioDeviceNames* device_names) override;
    AudioParameters GetInputStreamParameters(
        const std::string& device_id) override;
    const char* GetName() override;

    // AudioManagerBase implementation.
    AudioOutputStream* MakeLinearOutputStream(
        const AudioParameters& params,
        const LogCallback& log_callback) override;
    AudioOutputStream* MakeLowLatencyOutputStream(
        const AudioParameters& params,
        const std::string& device_id,
        const LogCallback& log_callback) override;
    AudioInputStream* MakeLinearInputStream(
        const AudioParameters& params,
        const std::string& device_id,
        const LogCallback& log_callback) override;
    AudioInputStream* MakeLowLatencyInputStream(
        const AudioParameters& params,
        const std::string& device_id,
        const LogCallback& log_callback) override;

    static snd_pcm_format_t BitsToFormat(int bits_per_sample);

protected:
    ~AudioManagerCras() override;

    AudioParameters GetPreferredOutputStreamParameters(
        const std::string& output_device_id,
        const AudioParameters& input_params) override;

private:
    // Called by MakeLinearOutputStream and MakeLowLatencyOutputStream.
    AudioOutputStream* MakeOutputStream(const AudioParameters& params);

    // Called by MakeLinearInputStream and MakeLowLatencyInputStream.
    AudioInputStream* MakeInputStream(const AudioParameters& params,
        const std::string& device_id);

    void GetAudioDeviceNamesImpl(bool is_input, AudioDeviceNames* device_names);

    void AddBeamformingDevices(AudioDeviceNames* device_names);

    // Stores the mic positions field from the device.
    std::vector<Point> mic_positions_;

    const char* beamforming_on_device_id_;
    const char* beamforming_off_device_id_;

    DISALLOW_COPY_AND_ASSIGN(AudioManagerCras);
};

} // namespace media

#endif // MEDIA_AUDIO_CRAS_AUDIO_MANAGER_CRAS_H_
